... in the depth of diamond core drill bit's matrix series. The matrix layer of the crown contains a uniform ... Core Bits: ZWF-Long, ZWF-Short9. T, TT, T2 &TB Series Metric Core Bits: T36, TT46, T2-46, TB56, TT56, T2 ... , T2-86 coreline, T2-101, T2-101 coreline10. T6 Series Metric Core Bits: T6-76, T6-86, T6-101, ... , T6S-101, T6S-116, T6S-131, T6S-14612. B Series(ISO3552-1) Metric Core Bits: B36, B46, B56, B65, ...